48-port 10/100Mbps Switch CISCO SF300-48 (SRW248G4-K9)

Performance

Capacity in Mpps (64-byte packets): 13.10

Switching Capacity in Gbps: 17.6

Layer 2 Switching

Spanning Tree Protocol: Standard 802.1d Spanning Tree support

Fast convergence using 802.1w (Rapid Spanning Tree), enabled by default

Multiple Spanning Tree instances using 802.1s

Port Grouping: Support for IEEE 802.3ad Link Aggregation Control Protocol

• Up to 8 groups

• Up to 8 ports per group with 16 candidate ports for each (dynamic) 802.3ad link aggregation

VLAN: Support for up to 256 VLANs simultaneously (out of 4096 VLAN IDs)

Port-based and 802.1Q tag-based VLANs

MAC-based VLAN

Management VLAN

Private VLAN Edge, also known as protected ports, with multiple uplinks

Guest VLAN

Unauthenticated VLAN

Voice VLAN: Voice traffic is automatically assigned to a voice-specific VLAN and treated with appropriate levels of QoS

Q-in-Q VLAN: VLANs transparently cross a service provider network while isolating traffic among customers

Generic VLAN Registration Protocol/Generic Attribute Registration Protocol: Protocols for automatically propagating and configuring VLANs in a bridged domain

Dynamic Host Configuration Protocol Relay at Layer 2: Relay of DHCP traffic to DHCP server in different VLAN. Works with DHCP Option 82

Internet Group Management Protocol Versions 1, 2 and 3 snooping: IGMP limits bandwidth-intensive multicast traffic to only the requesters; supports 256 multicast groups (source-specific multicasting is also supported)

IGMP Querier: IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router.

Head-of-Line (HOL) Blocking: HOL blocking prevention

Layer 3

IPv4 Routing: Wirespeed routing of IPv4 packets

Up to 32 static routes and up to 32 IP interfaces

Classless Inter-Domain Routing: Support for CIDR

DHCP Relay at Layer 3: Relay of DHCP traffic across IP domains

User Datagram Protocol Relay: Relay of broadcast information across Layer 3 domains for application discovery or relaying of BootP/DHCP packets

Security

Secure Shell Protocol: SSH secures Telnet traffic to and from the switch; SSH v1 and v2 are supported

Secure Sockets Layer: SSL support: Encrypts all HTTPS traffic, allowing highly secure access to the browser-based management GUI in the switch

IEEE 802.1X (Authenticator role): RADIUS authentication and accounting, MD5 hash; guest VLAN; unauthenticated VLAN, single/multiple host mode and single/multiple sessions

Supports time-based 802.1X

Dynamic VLAN assignment

STP Bridge Protocol Data Unit Guard: A security mechanism to protect the network from invalid configurations.

A port enabled for BPDU Guard is shut down if a BPDU message is received on that port

Secure Core Technology: Ensures that the switch will receive and process management and protocol traffic no matter how much traffic is received

Layer 3 Isolation: Allow/disallow routing between IP subnets or directly connected IP networks

Layer 2 Isolation Private VLAN Edge (PVE) with community VLAN: PVE (also known as protected ports) provides Layer 2 isolation between devices in the same VLAN, supports multiple uplinks

Port Security: Locks MAC addresses to ports, and limits the number of learned MAC addresses

RADIUS/TACACS+: Supports RADIUS and TACACS authentication. Switch functions as a client

Storm Control: Broadcast, multicast and unknown unicast

DoS Prevention: DoS attack prevention

Congestion Avoidance: A TCP congestion avoidance algorithm is required to minimize and prevent global TCP loss synchronization.

ACLs: Support for up to 512 rules

Drop or rate limit based on source and destination MAC, VLAN ID or IP address, protocol, port, differentiated services code point/IP precedence, TCP/ UDP source and destination ports, 802.1p priority, Ethernet type, Internet Control Message Protocol packets, IGMP packets, TCP flag

Quality of Service

Priority Levels: 4 hardware queues

Scheduling: Strict priority and weighted round-robin

Queue assignment based on DSCP and class of service (802.1p/CoS)

Class of Service: Port based; 802.1p VLAN priority based; IPv4/v6 IP precedence/type of service/DSCP based; Differentiated Services (DiffServ); classification and re-marking ACLs, trusted QoS

Rate Limiting: Ingress policer; egress shaping and rate control; per VLAN, per port and flow based

Standards

IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX Fast Ethernet, IEEE 802.3ab 1000BASE-T Gigabit Ethernet, IEEE 802.3ad LACP, IEEE 802.3z Gigabit Ethernet, IEEE 802.3x Flow Control, IEEE 802.1D (STP, GARP, and GVRP),IEEE 802.1Q/p VLAN, IEEE 802.1w RSTP, IEEE 802.1s Multiple STP, IEEE 802.1X Port Access Authentication, IEEE 802.3af, IEEE 802.3at, RFC 768, RFC 783, RFC 791, RFC 792, RFC 793, RFC 813, RFC 879, RFC 896, RFC 826, RFC 854, RFC 855, RFC 856, RFC 858, RFC 894, RFC 919, RFC 922, RFC 920, RFC 950, RFC 951, RFC 1042, RFC 1071, RFC 1123, RFC 1141, RFC 1155, RFC 1157, RFC 1350, RFC 1533, RFC 1541, RFC 1542, RFC 1624, RFC 1700, RFC 1867, RFC 2030, RFC 2616, RFC 2131, RFC 2132, RFC 3164, RFC 3411, RFC 3412, RFC 3413, RFC 3414, RFC 3415, RFC 2576, RFC 4330, RFC 1213, RFC 1215, RFC 1286, RFC 1442, RFC 1451, RFC 1493, RFC 1573, RFC 1643, RFC 1757, RFC 1907, RFC 2011, RFC 2012, RFC 2013, RFC 2233, RFC 2618, RFC 2665, RFC 2666, RFC 2674, RFC 2737, RFC 2819, RFC 2863, RFC 1157, RFC 1493, RFC 1215, RFC 3416

IPv6

IPv6: IPv6 host mode

IPv6 over Ethernet

Dual IPv6/IPv4 stack

IPv6 neighbor and router discovery

IPv6 stateless address auto-configuration

Path maximum transmission unit discovery

Duplicate address detection

ICMP version 6

IPv6 over IPv4 network with Intra-Site Automatic Tunnel Addressing Protocol support

IPv6 QoS: Prioritize IPv6 packets in hardware

IPv6 ACL: Drop or rate limit IPv6 packets in hardware

Multicast Listener Discovery Snooping: Deliver IPv6 multicast packets only to the required receivers

IPv6 Applications: Web/SSL, Telnet server/SSH, ping, traceroute, Simple Network Time Protocol, Trivial File Transfer Protocol, SNMP, RADIUS, syslog, DNS client, protocol-based VLANs

IPv6 RFCs Supported: RFC 2463 - ICMP version 6

RFC 3513 - IPv6 address architecture

RFC 4291 - IPv6 addressing architecture

RFC 2460 - IPv6 specification

RFC 2461 - Neighbor discovery for IPv6

RFC 2462 - IPv6 stateless address auto-configuration

RFC 1981 - Path MTU discovery

RFC 4007 - IPv6 scoped address architecture

RFC 3484 - Default address selection mechanism

RFC 4214 - ISATAP tunneling

RFC 4293 - MIB IPv6: Textual conventions and general group

RFC 3595 - Textual conventions for IPv6 flow label

Power Efficiency

Energy Detect: Automatically turns off power off on Gigabit Ethernet RJ-45 port when detecting link down

Active mode is resumed without loss of any packets when the switch detects the link up

Cable Length Detection: Adjusts the signal strength based on the cable length. Reduces the power consumption for cables shorter than 10 m.

General Features

Jumbo Frames: Frame sizes up to 10 KB supported on 10/100 and Gigabit interfaces

MAC Table: Up to 8000 MAC addresses

Discovery

Bonjour: The switch advertises itself using the Bonjour protocol

Link Layer Discovery Protocol (802.1ab) with LLDP-MED extensions: LLDP allows the switch to advertise its identification, configuration, and capabilities to neighboring devices that store the data in a MIB. LLDP-MED is an enhancement to LLDP that adds the extensions needed for IP phones

Cisco Discovery Protocol: The switch advertises itself using the Cisco Discovery Protocol

Ports

Total System Ports: 48 Fast Ethernet + 4 Gigabit Ethernet

RJ-45 Ports: 48 Fast Ethernet, 2 Gigabit Ethernet

Combo Ports (RJ-45 + SFP): 2 Gigabit Ethernet Combo

Buttons

Reset button

Cabling Type

Unshielded twisted pair Category 5 or better for 10BASE-T/100BASE-TX; UTP Category 5 Ethernet or better for 1000BASE-T

LEDs

System, Link/Act, Speed

Flash

16 MB

CPU

128 MB memory

Packet Buffer Memory

8 MB* 2

Power Supply

100-240V 47-63 Hz, internal, universal

Acoustic Noise

43.1 dB at 30°C

54.3 dB at 40°C

MTBF

@ 40°C (hours): 182540.0

Certifications

UL (UL 60950), CSA (CSA 22.2), CE mark, FCC Part 15 (CFR 47) Class A

Dimensions (DxWxH)

13.78 x 17.3 x 1.45' (350 x 440 x 36.83 mm)

Weight

12.94 lb (5.87 kg)